Parts 11-12:  Separate-Coverage Group:  LOWER COLORADO RIVER REGION (BELOW GRAND CANYON) SPECIALIZED MATERIAL

Part 11       [see also Special Note at bottom pertaining to the Appendix]

ENVIRONMENT, NATURAL HISTORY, AND SPECIAL SCIENTIFIC, TECHNICAL, OR CULTURAL ISSUES OF THE LOWER COLORADO RIVER REGION -- WITH GUIDES TO U.S. AND MEXICAN TOPOGRAPHIC QUADRANGLES

Environment, natural history, and certain special issues (including agriculture, archaeology and ethnological studies) specifically about the lower Colorado River corridor and adjacent lands below Grand Canyon — from Lake Mead, Arizona–Nevada, and through the Arizona–Nevada–California corridor to the Colorado River delta region in Baja California and Sonora, Mexico, including the areas of the Salton Sea and Imperial and Mexicali Valleys; and issues pertaining to the adjacent portion of the Upper Gulf of California

[Note: Users who wish to investigate the entirety of the Gulf of California may consult Richard C. Brusca's periodically updated "A Bibliography for the Sea of Cortez (Gulf of California)" at https://www.rickbrusca.com/http___www.rickbrusca.com_index.html/Research_files/Gulf%20Bibliography.pdf]

Section 1 — Environment, Ecology, Biology, and Public Health and Safety

Section 2 — Geology, Paleontology, Hydrology, and Related Disciplines

Section 2A — Separately Published Geologic and Special Maps

Section 3 — Archaeology, Indigenous Cultures and Issues, and Contemporary Cultural Resources

Section 3A — General Guide to Documentation for Places in the Lower Colorado River Region Listed in the NATIONAL REGISTER OF HISTORIC PLACES and in the NATIONAL HISTORIC LANDMARK SYSTEM Administered by the U.S. National Park Service Appendix — Guides to Topographic Quadrangle Maps of  the Lower Colorado River Region Produced by the U.S. Geological Survey and by the [México] Instituto Nacional de Estadística y Geografía


Appendix — Guides to Topographic Quadrangle Maps of the Lower Colorado River Region Produced by the U.S. Geological Survey and by the [México] Instituto Nacional de Estadística y Geografía

The appendix provides graphical and itemized guides to the topographic maps of the lower Colorado River region, produced by agencies of the United States and Mexico. Both legacy paper map guides and current online guides are referred to. Graphical guides illustrate the geographical arrangement of named topographical quadrangles. Itemized guides list, either alphabetically or by special geographical order, the quadrangle names within the region. These lists provide the names of quadrangles by which researchers may refer to either in physical map collections or in the U.S. Geological Survey’s very comprehensive collections of digitized historic and current maps. The alphabetical lists are provided so that users who wish to acquire complete sets may locate the maps easily by name.


SPECIAL NOTE: In the APPENDIX some illustrations embedded in the PDF that depict the system of topographic map quadrangles (which had been replicated from old-style paper copies) do not sufficiently display the quadrangle names when the PDFs are enlarged.  Click on the buttons below to download high-resolution JPEG images of these maps.